Possible monofin substitute?

[MermaidIsis]

Im making a tail for my friends little sister who is really like my little sister. She asked me to make her a tail, and how could i possibly ressist? The only problem is that they cant afford a proper monofin and since she is such a little thing i dont think a lot of monofins would fit her.
I had an idea that maybe if i were to make the tail out of fabric, i could open the fluke and squeeze silacone coulking Between the 2 layers of the fluke and mold foot pockets into the silacone. it would at least add a bit of propulsion and it would look better than with no monofin at all.
Has any one tried this or anything like it?

[Mahi Mermaid]

Kmart sells the "little mermaid" fin I think it's like $22 it's a monofin, for kids

[MermaidIsis]

I checked, that one is like forty bucks��

[Mermaid Allie]

It's thirty on amazon!

[ShyMer]

I would be concerned that using caulking would be too flimsy and wouldn't get her any propulsion. It still might be worth a test though. What about using regular swim fins?

[MermaidIsis]

Since she wont be using it quite as much or as extreamly as we do, i dont think she would need much propulsion but i think the only thing we would need to worry about is the fluke having structure and some sort of shape. I thought about running wire through the fluke to make it have shape, but that wire would eventually bend and snap.

[Blondie]

Getting cheap bi fins at the store and duct tapping them together works ^^

[MermaidIsis]

What would the shape be like with two fins that are attached?